CHAMBERLAIN model 963D transmitter. It transmits using on frequency 315 MHz, Security plus (315 MHz). It has 3 button(s).
The warranty on the 963D garage door transmitter is 1 year from CHAMBERLAIN.
The model 963D is still available.
CHAMBERLAIN model transmitter instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
(0.32 MB in English) This requires Acrobat 10 or higher